What do you know about lipids sources and uses ?
Lipids definition sources and uses :
Lipids definition sources and uses and properties are listed in this article.Lipids are triglycerides of fatty acids. The word lipid is derived from Greek word lipos meaning fat.
Lipids are macromolecules made up of fatty acids.
Oil and fats:
Lipids include oils and fats. Oils and fats are esters of long chain carboxylic (fatty) acids with glycerol.
These esters are made up of three fatty acids, therefore, they are called triglycerides.
Oils at room temperature :
Oils exist in liquid form at room temperature. They are triglycerides of unsaturated fatty acids.
Fats at room temperature :
At room temperature the fats exist in solid form . They are triglycerides of saturated fatty acids.
Fatty acids are building blocks of lipids.
They are long chain saturated or unsaturated carboxylic acids.
C15H31COOH palmitic acids
C17H35COOH stearic acid
Formation of esters by fatty acids :
Esters (oils or fats) are formed with glycerol from these acids in the presence of mineral acids.
Sources of lipids :
Fats and oils are high energy foods. They are source of vitamins A, D and E.
They are used to build brain cells, nerve cells and cell membrane.
In water they are insoluble but soluble in organic solvents. The fats stored in the body insulate it as they are poor conductor of heat and electricity.
Synthesis of fats and oils naturally :
Fats and oils are synthesized naturally by animals, plants and marine organism.
1. Animal fats are found in adipose tissue cells. We get milk from animals from which we get butter and ghee easily . Butter and ghee are used by us for cooking and frying of food, for preparing bakery products and sweets.
2. Animal fats are used in soap industry.
3. Plants synthesize oils and store them in seeds, such as sunflower oil, coconut oil, groundnut oil and corn oil. These oils are used as vegetable oils or ghee for cooking and other purpose.
Marine animals like salmon and whales are also source of oils. These oils are used as medicines e. g cod liver oil.